Exam Details
| Subject | Composite Materials | |
| Paper | ||
| Exam / Course | B.Tech in Aerospace Engineering (BTAE) | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | June, 2015 | |
| City, State | new delhi, |
Question Paper
What is the degree of polymerisation If a particular type of polyethylene has a molecular mass of 1,40,000 g/mol, what is its degree of polymerisation
(b) Distinguish between the. structure and the properties of thermosetting and thermoplastic resins.
What are some of the advantages of glass-fiber reinforced plastics?
What are the differences in the compositions of and S glasses Which is the strongest and the most costly?
What type of chemical bonding takes place within the aramid fibers What type of chemical bonding takes place between the aramid fibers?
What are two of the most important matrix plastics for fiber-reinforced plastics What are some advantages of each type?
Give examples of metal-matrix composites, and identify their advantages over polymer-matrix composites.
Explain in brief the benefits from Non-Destructive Testing (NDT). Discuss X-Ray NDT.
Define a composite material with respect to a material system. Give some suitable examples.
What are the three main types of synthetic fibers used to produce fiber-reinforced plastic composite materials Describe in brief each of them.
What are the processing steps for the production of carbon fibers from polycrylonitrile What reaction takes place at each step?
Describe the spray-up process for producing a fiber glass-reinforced part. What are some advantages and disadvantages of this method?
Distinguish between addition and condensation polymerisation and state which of these are applied for processing polyethylene and polycarbonates.
A metal-matrix composite is made with 75 percent by volume of aluminum alloy 2124-T6 and 25 percent by volume of SiC whiskers. The density of the 2124-T6 alloy is 2·75 g/cm^3 and that of the whiskers is 3·12 g/cm^3. Calculate the average density of the composite material.
It is generally true that fibers are stronger (in the length direction) than the bulk material from which they are made. Explain.
Describe in brief Ultrasonic NDT.
Describe the injection moulding process for plastics. How is it different from other thermoplastic forming techniques
unidirectional carbon-fiber-epoxy-resin composite contains 68 percent by volume of carbon fiber and 32 percent epoxy resin. The density of the carbon fiber is 1·79 g/cm^3 and the average density of the composite material is 1·60 g/cm^3. Determine
the density of the epoxy resin,
the weight percentage of carbon fibers and epoxy resin in the composite.
10. Calculate the tensile modulus of elasticity of a laminate composite consisting of 62 percent by volume of unidirectional Kevlar 49 fibers and an epoxy matrix stressed under isostress conditions. The tensile modulus of elasticity of the Kevlar 49 fibers is 170 GPa and that of the epoxy is 3·70 x 10^3 MPa.
(b) Distinguish between the. structure and the properties of thermosetting and thermoplastic resins.
What are some of the advantages of glass-fiber reinforced plastics?
What are the differences in the compositions of and S glasses Which is the strongest and the most costly?
What type of chemical bonding takes place within the aramid fibers What type of chemical bonding takes place between the aramid fibers?
What are two of the most important matrix plastics for fiber-reinforced plastics What are some advantages of each type?
Give examples of metal-matrix composites, and identify their advantages over polymer-matrix composites.
Explain in brief the benefits from Non-Destructive Testing (NDT). Discuss X-Ray NDT.
Define a composite material with respect to a material system. Give some suitable examples.
What are the three main types of synthetic fibers used to produce fiber-reinforced plastic composite materials Describe in brief each of them.
What are the processing steps for the production of carbon fibers from polycrylonitrile What reaction takes place at each step?
Describe the spray-up process for producing a fiber glass-reinforced part. What are some advantages and disadvantages of this method?
Distinguish between addition and condensation polymerisation and state which of these are applied for processing polyethylene and polycarbonates.
A metal-matrix composite is made with 75 percent by volume of aluminum alloy 2124-T6 and 25 percent by volume of SiC whiskers. The density of the 2124-T6 alloy is 2·75 g/cm^3 and that of the whiskers is 3·12 g/cm^3. Calculate the average density of the composite material.
It is generally true that fibers are stronger (in the length direction) than the bulk material from which they are made. Explain.
Describe in brief Ultrasonic NDT.
Describe the injection moulding process for plastics. How is it different from other thermoplastic forming techniques
unidirectional carbon-fiber-epoxy-resin composite contains 68 percent by volume of carbon fiber and 32 percent epoxy resin. The density of the carbon fiber is 1·79 g/cm^3 and the average density of the composite material is 1·60 g/cm^3. Determine
the density of the epoxy resin,
the weight percentage of carbon fibers and epoxy resin in the composite.
10. Calculate the tensile modulus of elasticity of a laminate composite consisting of 62 percent by volume of unidirectional Kevlar 49 fibers and an epoxy matrix stressed under isostress conditions. The tensile modulus of elasticity of the Kevlar 49 fibers is 170 GPa and that of the epoxy is 3·70 x 10^3 MPa.
Other Question Papers
Departments
- Centre for Corporate Education, Training & Consultancy (CCETC)
- Centre for Corporate Education, Training & Consultancy (CCETC)
- National Centre for Disability Studies (NCDS)
- School of Agriculture (SOA)
- School of Computer and Information Sciences (SOCIS)
- School of Continuing Education (SOCE)
- School of Education (SOE)
- School of Engineering & Technology (SOET)
- School of Extension and Development Studies (SOEDS)
- School of Foreign Languages (SOFL)
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- School of Health Science (SOHS)
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- School of Performing Arts and Visual Arts(SOPVA)
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Subjects
- Aerodynamics- I
- Aerodynamics- II
- Aircraft Design/Launch Vehicle/ Rocket Design
- Aircraft Instruments
- Aircraft Safety and Maintenance Engineering
- Aircraft Structures
- Aircraft Systems And Airworthiness Requirements
- Applied Chemistry
- Applied Physics
- Basic Control Theory
- CNS-ATM system
- Composite Materials
- Computer Fundamentals
- Engineering Drawing
- Environmental Science
- Flight Mechanics
- High Speed Aerodynamics
- Instruction To Computer Play Device
- Introduction to Aeronautics
- Introduction To Rocket And Missiles
- Mechanics Design
- Propulsion- I
- Propulsion- II
- Rocket Propulsion
- Space Dynamics
- Strength of Materials
- Technical Writing and Communication Skills
- Workshop Technology